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LMC6681 Datasheet(PDF) 2 Page - Texas Instruments |
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LMC6681 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 26 page LMC6681 Single/LMC6682 Dual/LMC6684 Quad Low Voltage, Rail-To-Rail Input and Output CMOS Amplifier with Powerdown General Description The LMC6681/2/4 is a high performance operational ampli- fier which can operate over a wide range of supply voltages, with guaranteed specifications at 1.8V, 2.2V, 3V, 5V, and 10V. The LMC6681/2/4 provides an input common-mode voltage range that exceeds both supplies. The rail-to-rail output swing of the amplifier assures maximum dynamic signal range. This rail-to-rail performance of the amplifier, com- bined with its high open-loop voltage gain makes it unique among CMOS rail-to-rail amplifiers. The LMC6681/2/4 is an excellent choice for circuits where the common-mode volt- age range is a concern. The LMC6681/2/4 has a powerdown mode which can be controlled externally. In this powerdown mode, the supply current decreases from 700 µA per amplifier to less than 1 µA per amplifier. The LMC6684 has two powerdown options. Each of the powerdown pins disables two amplifiers. The LMC6681/2/4 has been designed specifically to improve system performance in low voltage applications. The ampli- fier’s 80 fA input current, 0.5 mV offset voltage, and 82 dB CMRR maintain accuracy in battery-powered systems. Features (Typical unless otherwise noted) n Guaranteed Specs at 1.8V, 2.2V, 3V, 5V, 10V n Rail-to-Rail Input Common-Mode Voltage Range n Rail-to-Rail Output Swing (within 10 mV of supply rail, @ V S=3V and RL=10 kΩ) n Powerdown Mode I S OFF ≤ 1.5 µA/Amplifier (Guaranteed at V S = 1.8V, 2.2V, 3V, and 5V) n Ultra Low Input Current 80 fA n High Voltage Gain (VS = 3V, RL = 10 kΩ): 120 dB n Unity Gain Bandwidth 1.2 MHz Applications n Battery Operated Circuits n Sensor Amplifiers n Portable Communication Devices n Medical Instrumentation n Battery Monitoring Circuits n Level Detectors, Sample-and-Hold Circuits Connection Diagrams 8-Pin DIP/SO DS012042-1 Top View 14-Pin DIP/SO DS012042-2 Top View 16-Pin DIP/SO DS012042-3 Top View May 1995 © 1999 National Semiconductor Corporation DS012042 www.national.com |
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